Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Nanoporous silver cathode surface-treated by aerosol-assisted chemical vapor deposition of gadolinia-doped ceria for intermediate-temperature solid oxide fuel cells

Authors
Choi, Hyeon RakNeoh, Ke CheanChoi, Hyung JongHan, Gwon DeokJang, Dong YoungKim, DaejoongShim, Joon Hyung
Issue Date
31-10월-2018
Publisher
ELSEVIER SCIENCE BV
Keywords
Solid oxide fuel cells; Aerosol-assisted chemical vapor deposition; Gadolinia-doped ceria; Silver; Cathode
Citation
JOURNAL OF POWER SOURCES, v.402, pp.246 - 251
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF POWER SOURCES
Volume
402
Start Page
246
End Page
251
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/72427
DOI
10.1016/j.jpowsour.2018.09.031
ISSN
0378-7753
Abstract
Herein, a nanoporous silver surface treated with gadolinia-doped ceria (GDC) is evaluated as a cathode for intermediate-temperature solid oxide fuel cells operating below 500 degrees C. For uniform surface treatment on the porous silver, aerosol-assisted chemical vapor deposition (AACVD) is used; it is a non-vacuum process and is considered as an economical alternative to the expensive vacuum-environment thin-film fabrication methods. Consequently, a uniform coating of AACVD GDC on the Ag surface is successfully achieved, which is confirmed by high-resolution transmission electron microscopy. The optimized amount of AACVD GDC enhances fuel cell performance compared to cells with bare Ag, in terms of the power and long-term stability measured by current voltage characteristics, electrochemical impedance spectroscopy, and potentiostatic amperometry. This performance is even more significant than that from the cell with a platinum cathode, which, to our best knowledge, is known as the best-performing catalyst for solid oxide fuel cells in the intermediate- and low-temperature regimes. The power enhancement is attributed to the improved kinetics with the GDC surface coating; moreover, this oxide decoration is proven effective in preventing the thermal agglomeration of Ag, as confirmed by the morphology comparison before and after the long-term test.
Files in This Item
There are no files associated with this item.
Appears in
Collections
College of Engineering > Department of Mechanical Engineering > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Shim, Joon Hyung photo

Shim, Joon Hyung
공과대학 (기계공학부)
Read more

Altmetrics

Total Views & Downloads

BROWSE